How about this.
Following your logic of Absolutes - Very ANTZ like by the way, and I actually know and talk with a professional one quite often.(fellow employee and political activist)
Diketones Must Be completely Dangerous or PERFECTLY SAFE.
I Say ANTZ LOGIC because they use those exact same minute proof arguments. The least little doubt is Good enough for an all on fight to get what they want.
Air is a Necessity for life
Air is NOT perfectly Safe
Something May be Dangerous in proven Quantity, say Nicotine

, but relatively(not Perfectly) safe in another(PROVEN) quantity.
This is why I keep asking:
Where is the Scientific Medical Data?
Watch out for the Bumble Bee in that Safe Air